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Finding the Fourth Proportional to 659,982.38, 989,990.66 and 210,702.87

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Solution

The fourth proportional to 659,982.38, 989,990.66 and 210,702.87 is: 316,059.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,982.38 : 989,990.66 = 210,702.87 : x
  2. Step 2: Convert to fraction form
    659,982.38/989,990.66 = 210,702.87/x
  3. Step 3: Cross multiply
    659,982.38x = 989,990.66 × 210,702.87
  4. Step 4: Simplify right side
    659,982.38x = 208,593,872,676.75
  5. Step 5: Solve for x
    x = 208,593,872,676.75/659,982.38
  6. Step 6: Final answer
    x = 316,059.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.